<?php
/**
 * CFormModel class file.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright 2008-2013 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

/**
 * CFormModel represents a data model that collects HTML form inputs.
 *
 * Unlike {@link CActiveRecord}, the data collected by CFormModel are stored
 * in memory only, instead of database.
 *
 * To collect user inputs, you may extend CFormModel and define the attributes
 * whose values are to be collected from user inputs. You may override
 * {@link rules()} to declare validation rules that should be applied to
 * the attributes.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @package system.web
 * @since 1.0
 */
class CFormModel extends CModel
{
    private static $_names = array();

    /**
     * Constructor.
     * @param string $scenario name of the scenario that this model is used in.
     * See {@link CModel::scenario} on how scenario is used by models.
     * @see getScenario
     */
    public function __construct($scenario = '')
    {
        $this->setScenario($scenario);
        $this->init();
        $this->attachBehaviors($this->behaviors());
        $this->afterConstruct();
    }

    /**
     * Initializes this model.
     * This method is invoked in the constructor right after {@link scenario} is set.
     * You may override this method to provide code that is needed to initialize the model (e.g. setting
     * initial property values.)
     */
    public function init()
    {
    }

    /**
     * Returns the list of attribute names.
     * By default, this method returns all public properties of the class.
     * You may override this method to change the default.
     * @return array list of attribute names. Defaults to all public properties of the class.
     */
    public function attributeNames()
    {
        $className = get_class($this);
        if (!isset(self::$_names[$className])) {
            $class = new ReflectionClass(get_class($this));
            $names = array();
            foreach ($class->getProperties() as $property) {
                $name = $property->getName();
                if ($property->isPublic() && !$property->isStatic())
                    $names[] = $name;
            }
            return self::$_names[$className] = $names;
        } else
            return self::$_names[$className];
    }
}